Diesel engine



Oct. 1940- D. T. OSULLIVAN DIESEL ENGINE Filed May 16, 1938 INVENTOR.[191131] 0380101421:

ATTORNEY:

Patented Och 1, 1940 PATENT OFFICE DIESEL ENGINE Denis T. OSullivan,West Orange, N. J., assignor of one-half to Philip S. McLean,Bloomfield,

Application May 16, 1938, Serial No. 208,161

2 Claims.

The invention herein disclosed relates to engines operating on theDiesel, fuel-injection principle. This patent application is a partialcontinuation of the copending application for patent Ser. No. 746,511filed October 2, 1934-.

Objects of this invention are to improve the operation of Dieselengines, particularly in eliminating formation of carbon, preventingknock and hammer and in general smoothing out the action of the engine.

These and other desirable objects are attained by the novel combinationand method of operation hereinafter fully disclosed and broadly claimed.

The drawing accompanying and forming part of the following specificationillustrates a typical embodiment of the invention. Structure, it will beunderstood, may be modified and changed in various ways, all within thetrue intent and broad scope of the invention as hereinafter defined andclaimed.

, In the drawing, the single view is a broken part sectionalillustration of a Diesel engine utilizing and having the inventionincorporated therein.

The engine I, is shown as of typical Diesel design, having an air intake2, common to the several cylinders and provided with fuel injectingmeans 3, for each cylinder. The air intake and fuel injection iseffected and controlled in accord- 3o ance with the operating design ofthe engine, but

whether it be two cycle or four cycle, or otherwise,-the valving is suchthat a charge of air is taken in and compressed and the fuel injected'into the intake highly compressed charge of air. The ignition may beeffected by the heat of compression, electric spark or a'combination ofthese,

or otherwise. The fuels employed in such engines are relatively heavy,usually in the range of the inter- 7 o mediate distillates knowncommercially as fuel .oil", varying moreor less m composition due todifferent methods of refining and sources of the crude. These variablesare particularly detrimental to uniform and eiiicient operation ofDiesel engines.

The praent invention consists in introducing a derivative of coal tardistillation having the characteristics of the carbo cyclic compoundnaphthalene (CmHs) into the air stream prior to fuel. This highlycompressed naphthalenated air mixes more readily with the fuel, largelyor completely eliminating carbon formation and reduces 55 or eliminatesthe knock and hammer quite common in engines of the Diesel orsemi-Diesel type.

The combination of the compressed naphthalenated air with the injectedfuel produces smoother, more uniform operation and may reduce theproportion of fuel required. The compressed naphthalenated air furtherhas a stabilizing effect, seemingly compensating to an extent for thevarying characteristics mentioned above, found in commercial fuel oils.

While the air which is admitted to the cylinder may be naphthalenated invarious ways, one 10 practical method, as illustrated, is to support amass or body of naphthalene 4, in the solidsocalled moth ball state, ina basket or like container 5, screened, or of a suitable mesh to holdback small particles, removably engaged in the 15 main air passage 6, ofthe air cleaner I. A special advantage of this particular combinationlies in the fact that this air cleaner is usually mounted directly overthe head of the engine, where it is well heated and which heatmaterially promotes an sublimation of the naphthalene. In this relation,the naphthalene balls are warmed and the air is warmed before it strikesthem to produce naphthalene vapor or fumes which, compressed and furtherheated in the cylinder, combine to ad- 5 vantage with the injected heavyfuel oil. This particular combination in addition to other advantagesmentioned,'keeps the valves and cylinder parts clean and by itsbeneficial eflect on the fuel enables lower grade fuels to besuccessfully 3o employed. Possibly due to more complete combustionresulting from this novel combination, smoke and objectionable odor arelargely or .completely eliminated from the exhaust.

The references herein to Diesel engines are in- 35 tended to contemplatesemi-Diesels and engines generally of the fuel injection type.

What is claimed is:

1. An engine of the Diesel type, having an air cleaner in the air intakeand arranged immedio ately over the head of the engine to derive heattherefrom, a screen in said air cleaner for the main air passage intothe engine and said screen being adaptedto support naphthalene.

2; In combination with an internal combustio engine having a downwardlydirected air intake in the head portion of the engine and therebysubjected to the heat in the head of said engine, an air cleanerconnectedwith said heated air intake and having a screened holder in thepath of air flow down into said air intake and said screened holderbeing adapted to confine and support a body of naphthalene in the airstream in said air intake.

DENIS T. OSULLIVAN.

